LGiven the table that shows the estimation of the total number of t-shirts that the club can sell at different prices (in dollars), you can identify the following points:

The equation of the line in Slope-Intercept Form is:

Where "m" is the slope and "b" is the y-intercept.
You can find the slope using this formula:

Where these points are two points on the line:

In this case, you can substitute the coordinates of these points into the formula and evaluate, in order to find the slope of the line:

Then, you get:

In order to find the value of "b", substitute the slope and the coordinates of one of the points into this equation:

And solve for "b". Using the point:

You get:


Now you know that the equation of this line in Slope-Intercept Form is:

In order to find the approximate number of t-shirts that could be sold for $8, you need to substitute this value of "x" into the equation and evaluate:

Then, you get:

Hence, the answer is: Third option.